blocks|key|1677694|text|是的，要使用C#+6特性，您需要一个C#+6编译器。Visual+2013没有C#+6编译器。2015确实如此。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1677695|Visual+2013已经有了罗斯林预发行版，但它们并没有实现最终的C#+6:它们实际上没有实现所有的特性，而且它们实现的功能与最终的C#+6行为不同。|1677696|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Yes, to use C# 6 features, you need a C# 6 compiler. Visual Studio 2013 doesn't have a C# 6 compiler. Visual Studio 2015 does.

There have been Roslyn pre-releases for Visual Studio 2013, but they don't implement the final C# 6: they actually don't implement all the features, and what they do implement is different from the final C# 6 behaviour.

blocks|key|513730|text|是的，您需要使用2015。它在VS+2013中不受支持。相关链接：https://msdn.microsoft.com/en-us/library/dn986596.aspx|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|513731|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/dn986596.aspx^0|X|1I|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

yes you need to use Visual Studio 2015. It's not supported in VS 2013. Related link : <a href="https://msdn.microsoft.com/en-us/library/dn986596.aspx">https://msdn.microsoft.com/en-us/library/dn986596.aspx</a>

blocks|key|1677801|text|在as+2015之前，您可以将以下类添加到解决方案中，并按照nameof(中的建议用NameOf.nameof(()+=>替换所有获取变量或参数的名称实例|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1677802|using+System;
using+System.Linq.Expressions;

namespace+ICSharpCode.SharpZipLib
{
++++public+class+NameOf
++++{
++++++++public+static+String+nameof<T>(Expression<Func<T>>+name)
++++++++{
++++++++++++MemberExpression+expressionBody+=+(MemberExpression)name.Body;
++++++++++++return+expressionBody.Member.Name;
++++++++}
++++}
}|code-block|syntax|javascript|1677803|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/9801624/get-name-of-a-variable-or-parameter^0|U|7|16|J|1T|A|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

In pre-VS2015 you can add the following class to your solution and replace all instances of <code>nameof(</code> with <code>NameOf.nameof(() =&gt;</code> as suggested in <a href="https://stackoverflow.com/questions/9801624/get-name-of-a-variable-or-parameter">get name of a variable or parameter</a>

<pre><code>using System;
using System.Linq.Expressions;

namespace ICSharpCode.SharpZipLib
{
 public class NameOf
 {
 public static String nameof&lt;T&gt;(Expression&lt;Func&lt;T&gt;&gt; name)
 {
 MemberExpression expressionBody = (MemberExpression)name.Body;
 return expressionBody.Member.Name;
 }
 }
}
</code></pre>

blocks|key|513888|text|安装这个nuget软件包为我的项目修复了它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|513889|Install-Package+Microsoft.CodeDom.Providers.DotNetCompilerPlatform|code-block|syntax|javascript|513890|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Installing this nuget package fixed it for my project.
<pre><code>Install-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform
</code></pre>

blocks|key|1126314|text|您将无法在C#6中使用VS2013。编译器将不理解您试图使用的新C#+6语法。如何将C#+6.0添加到2013？|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1126315|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/27462553/how-can-i-add-c-sharp-6-0-to-visual-studio-2013^0|13|H|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You will not be able to use C#6 in VS2013. The compiler will not understand the new C# 6 syntax you are trying to use.
<a href="https://stackoverflow.com/questions/27462553/how-can-i-add-c-sharp-6-0-to-visual-studio-2013">How can I add C# 6.0 to Visual Studio 2013?</a>

blocks|key|513875|text|如果您在Teamcity中获得此错误，请进行以下更改以构建步骤以更正该错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|513876|在teamcity中打开您的MSBuild步骤|ordered-list-item|513877|将MSBuild版本更改为2015|513878|将MSBuild+ToolVersion更改为14.0|513879|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|M|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|N|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|O|8|@]|9|@]|A|$]]]|J|$]]

If you are getting this error in Teamcity, make the following changes to build step to correct it.

<ol>
<li>Open your MSBuild step in teamcity</li>
<li>Change the MSBuild version to Microsoft Build Tools 2015</li>
<li>Change the MSBuild ToolVersion to 14.0</li>
</ol>

blocks|key|513903|text|我在使用DotNetFiddle时遇到了这个错误，我只是切换到.NET核心，而不是.NET+4.7.X。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|513904|entityMap|0|LINK|mutability|MUTABLE|url|https://dotnetfiddle.net/^0|4|C|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I got this error when using <a href="https://dotnetfiddle.net/" rel="nofollow noreferrer">DotNetFiddle</a>, I just switched to .NET Core instead of .NET 4.7.X.

blocks|key|513843|text|在"Package“中，执行”install+Microsoft.Net.Compilers“，并选择相应的项目。|type|ordered-list-item|depth|inlineStyleRanges|entityRanges|data|513844|确保项目设置中的"C#语言级别“是"C#+6.0”。|513845|unstyled|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|H|8|@]|9|@]|A|$]]|$1|D|3|-4|5|E|7|I|8|@]|9|@]|A|$]]]|F|$]]

<ol>
<li>In "Package Manager Console" execute "install-package Microsoft.Net.Compilers" with your respective project selected.</li>
<li>Ensure "C# Language Level" is "C# 6.0" in your project settings.</li>
</ol>

blocks|key|1126418|text|如果您得到了这个错误并且正在使用最新的.Net，这可能是因为您使用的是不是.Net类型的东西的名称。下面是一个例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1126419|原版需要替换HardCoded+"BaseUrl“。|1126420|IConfiguration+settingsConfig+=+new+ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
Settings+=+Options.Create(new+Settings
{
++BaseUrl+=+settingsConfig.GetSection("BaseUrl").Value
});|code-block|syntax|javascript|1126421|这会导致错误，并且无法工作，因为BaseUrl不存在于上下文中：|1126422|IConfiguration+settingsConfig+=+new+ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
Settings+=+Options.Create(new+Settings
{
++BaseUrl+=+settingsConfig.GetSection(nameof(BaseUrl)).Value
});|1126423|您需要完全限定或指定存在的.Net类型，例如：|1126424|Settings+=+Options.Create(new+Settings
{
++BaseUrl+=+settingsConfig.GetSection(nameof(Settings.BaseUrl)).Value
});|1126425|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

If you get this error and are using the latest .Net it could be because you are using the name of something that isn't a .Net Type. Here's an example:
Original with need to replace HardCoded &quot;BaseUrl&quot;.
<pre><code>IConfiguration settingsConfig = new ConfigurationBuilder().AddJsonFile(&quot;appsettings.json&quot;).Build();
Settings = Options.Create(new Settings
{
 BaseUrl = settingsConfig.GetSection(&quot;BaseUrl&quot;).Value
});
</code></pre>
This causes the error and it doesn't work because the BaseUrl doesn't exist in context:
<pre><code>IConfiguration settingsConfig = new ConfigurationBuilder().AddJsonFile(&quot;appsettings.json&quot;).Build();
Settings = Options.Create(new Settings
{
 BaseUrl = settingsConfig.GetSection(nameof(BaseUrl)).Value
});
</code></pre>
You need to fully qualify or specify a .Net Type that exists, eg:
<pre><code>Settings = Options.Create(new Settings
{
 BaseUrl = settingsConfig.GetSection(nameof(Settings.BaseUrl)).Value
});
</code></pre>

I'm using VS 2013 with .Net Framework 4.6. I want to use new C# 6 features(For example <code>nameof</code>).But I couldn't found it. 

<a href="https://i.stack.imgur.com/HcI5Y.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HcI5Y.png" alt="enter image description here"></a>

Should I use VS 2015? Or higher .Net Framework?

The name 'nameof' does not exist in the current context

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用VS 2013与.Net框架4.6。我想使用新的C# 6特性(例如，nameof).But，我找不到它。​​我应该使用VS 2015吗？还是更高级的.Net框架？

问名称'nameof‘在当前上下文中不存在
EN

回答 9

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